7.12.5 MINIMUM (HE) ROOM SIZE AND CONSTRUCTION SHALL BE AS FOLLOWS
(a) Each HE equipment and associated Control Room that is required by
system design shall be rectangular in shape and free of obstructions,
such as columns and braces, if possible. If columns or braces are
present, they shall not impede the installation or operation of each
individual system head-end equipment and access to each equipment
cabinet's front, side, or rear areas. The floor area occupied by the
column shall not be counted as a part of the room's minimum useable
square ft. requirements. A minimum of 900 mm (3 ft.) shall be provided
around each cabinet unless the cabinets are installed joined or side by
side where the 900 mm (3 ft.) rule applies around the entire assembly.
Minimum ceiling height shall be 2.4 m (8 ft.) above finish floor. The
Equipment Room shall be a minimum of 3.7 m x 4.3 m (12 ft. x 14 ft.),
or as large as the sum of the provided planned and two spare systems
and access require.
(b) Each HE Equipment Room shall have a finished floor of material
consisting of antistatic properties. Additional space shall be provided
for necessary UPS and/or associated batteries required by designated
Critical Life, Public and Staff Safety Systems (i.e. Radio Paging for
Code One [aka Blue], Two-Way Radio for Security and Engineering Service
and PA, if located in this area).
(c) Refer to Articles 8.11, 8.12 and 8.13 for requirements on the
following:
(1) Backboards
(2) EMI
(3) Floor loading
(4) Floors and Walls
(5) Security
(6) Water and Drainage
(7) Wire management
7.12.6 BASEMENT INSTALLATIONS
Refer to Article 8.13 for information.
7.12.7 GROUNDING
(a) Lightning Protection System - A lightning ground copper bus shall
be provided with a connection point located on the outside of the
building where each of the system antenna cables and external wires
enter the building. It shall be of sufficient size to allow each system
antenna cable, control wire lightning protector and separate ground
wire to each antenna mast to be connected directly to it. It shall be
connected to the Facility's external lightning protection system or
directly run to earth ground on the outside of the building by a MIN
mechanically and electrically protected #2 AWG stranded copper wire.
7-6
ELECTRICAL DESIGN MANUAL
SPECIAL TELECOMMUNICATION SYSTEMS
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